drm/radeon/kms: fix vram start calculation on ontario (v2)

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 522d29b37007..f7d7477daffb 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -1134,6 +1134,12 @@ static void evergreen_mc_program(struct radeon_device *rdev)
                         rdev->mc.vram_end >> 12);
         }
         WREG32(MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR, 0);
+        if (rdev->flags & RADEON_IS_IGP) {
+                tmp = RREG32(MC_FUS_VM_FB_OFFSET) & 0x000FFFFF;
+                tmp |= ((rdev->mc.vram_end >> 20) & 0xF) << 24;
+                tmp |= ((rdev->mc.vram_start >> 20) & 0xF) << 20;
+                WREG32(MC_FUS_VM_FB_OFFSET, tmp);
+        }
         tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
         tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
         WREG32(MC_VM_FB_LOCATION, tmp);